Chapter 17.1 Mirrors. Mirrors have been used for thousands of years. Polished metal was used to reflect The usage of today was made possible by Jean Foucault.

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Presentation on theme: "Chapter 17.1 Mirrors. Mirrors have been used for thousands of years. Polished metal was used to reflect The usage of today was made possible by Jean Foucault."— Presentation transcript:

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Chapter 17.1 Mirrors

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Mirrors have been used for thousands of years. Polished metal was used to reflect The usage of today was made possible by Jean Foucault –Developed a way to coat glass with silver

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The Law of Reflection θ i = θ r The angle of incidence equals the angle of reflection The angles are always measured to the normal The normal is a line drawn perpendicular to the surface

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Concave Mirrors Example is the inside of a spoon “caves” inward The inner surface of a sphere There is a radius,r, the geometric center

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Principal axis-the straight line perpendicular to the surface of the mirror at its center Focal point, F, is the point at which a distant object would be in focus The focal point is half the distance between the mirror and the center of curvature (radius), C

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Focal length, f, is the distance from the focal point to the mirror

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Real Vs Virtual Images Real image-ray actually converge and pass through the image Image can be seen on a screen Produced only by concave mirrors